This engaging Spanish-translated nonfiction e-book tells the story of two different ecosystems -the declining fish population in the Claymount Stream and the declining number of birds in the Mainsville Woods. These stories provide readers with modeling and practice through prime examples of predicting causes, collecting data, making meaningful conclusions, and finding problem-solving solutions. Readers will develop STEM skills while building content-area literacy in mathematics, life science, and ecology. The interesting stories, vivid images, easy-to-read informational text, clear mathematical charts and diagrams, and text features such as a glossary and index, will keep readers engaged and confident that they can analyze data to solve these problems and many others!